I tried play­ing Pat with a 38mm ball today, and had a hard time keep­ing it on the table. The ITTF only sup­ports the use of the 40mm now, which is the only size the club uses, so I was­n’t used to the light­ness of the 38. Basically I had to play con­ser­v­a­tive­ly the entire time, which is fair­ly frus­trat­ing when the best part of my game is smash­ing and counter-dri­ving. After an hour, sweat start­ed to sting my eyes, and I had a hard time keep­ing track of the ball. On a good note, my back­hand loop is get­ting much bet­ter, even though fatigue has a heavy affect on the con­sis­ten­cy.